Inking mechanism for platen printing-presses.



lVi. ROCKSTROH. INKING MECHANISM FOR PLATEN PRINTING PRESSES.

APPLICATION FILED JAN-26, 1914.

1. 18958% Patented May18,1915.

Fig.1 Fig.2

THE NORRIS PETERS C0., PHOTO-LITHO.. \VASHINGTON. D. L

MAX ROCKSTROH, OF KLEIN SEDLITZ, NEAR PIRNA, GERMANY.

INKING MECHANISM FOR PLATEN PRINTING-PRESSES.

iasassa.

Specification of Letters Patent.

Patented May 18, 1915.

Application filed. January 26, 1914. Serial No. 814,590.

To aZZ whom it may concern:

Be it known that 1, MAX RocKsTRoH, manufacturer, subject of the Kingdom of Saxony, in the German Empire, residing at Villa Liitzow, Klein Sedlitz, near Pirna, Germany, have invented certain new and useful Improvements in Inking Mechanism for Platen Printing-Presses, of which the following is a specification.

Hitherto, in connection with double acting inking devices for platen printing presses, it has been usual that the inking rollers, after he first inking of the form bed, travel into contact with two rotating distributing rollers, below the form bed, whereby the ink still adhering to the inking rollers and together with fresh ink brought down by the rider rollers, is evenly spread prior to the second inking of the form bed. The inking rollers roll rapidly over these distributing rollers, so that the time available for distributing the ink is comparatively short.

The object of my invention is to provide an arrangement whereby a longer period of distribution is obtained, resulting in a better inking of the form bed.

The invention is illustrated in the accompanying drawing, in which Figure 1 is a front view of the inking mechanism, and Fig. 2 is a side View of the same.

The inking rollers a, with the rider rollers b, are supplied with fresh ink by the ductor rollers c and (Z. In the course of the descent of the inking rollers 64, the form bed 6 is inked and the rollers a then come into contact with an endless web 9 which travels over two driven drums f, and the tension of which is regulated by means of an adjustable roller it, the latter also serves to rub the ink on the web. The inking rollers a remain for a comparatively long period in intimate contact with the web g, so that a uniform distribution of ink on all the inking rollers, riders and web is insured. During the up ward movement the form is inked with the freshly rubbed ink in the well known manner.

Having now particularly described and ascertained the nature of my said invention and in What manner the same is to be performed, I declare that what I claim is 1-- 1. In platen printing presses having a double acting inking device, in combination with the inking rollers, their riders and duetors, an endless web intimately contacting with said inking rollers, means for guiding said web, and means for tensioning the same and for uniformly distributing ink over its face for distribution over the inking rollers during their contact therewith.

2. In platen printing presses having a double acting inking device, in combination with the inking rollers thereof, their riders and ductors, an endless web intimately contacting with said inking rollers while passing the same, revolving drums for guiding said web past said rollers. and an adiustable tensionand inking roller adapted to regu late the tension of said web, and to uniformly distribute ink over the same for dis tribution over the ink rollers during their contact with said web.

In testimony whereof I have hereunto set O. PARSONS, PAUL ARRAs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents,

Washington, D. G. 

